Analysis of the factor in death rate in hospital of patients with ST-segment elevation myocardial infarction: An analysis of data from Cardiovascular Intervention Procedures Database

Objective　To explore the relationship between symptom-onset-to-balloon time and in-hospital mortality in patients with ST elevation myocardial infarction (STEMI). Methods　Since October 2010, all cardiovascular intervention procedures in military hospitals were registered online, including coronary interventions. Data in this study were originated from this registry database. Primary endpoint was in-hospital mortality, and it was stratified by age and infarction location to explore the effects of these factors on the mortality rate. Results　8878 STEMI patients from 92 military medical centers were enrolled in this study. These patients were divided into 3 groups by the length of onset-to-vessel opening time: interval ≤3h (n=2999), interval between 3 and 6h (n=2369), and interval >6h (n=3510). The in-hospital mortality rate in those groups was 2.5%, 2.9% and 3.0%, respectively (P=0.405). In interval ≤3h group, mortality rate in young ( 70 years) patients with anterior MI was as high as 7.4% (P<0.001). Conclusions　In-hospital mortality rate in STEMI patients is related to onset-to-vessel opening time. Patients with old age or anterior MI are a high-risk cohort. DOI: 10.11855/j.issn.0577-7402.2015.04.02